442M™ Split Mixer SealInstallation Instructions

INSTALLATIONINSTRUCTIONS

2

EQUIPMENT PREPARATION

1

3 4

ø200

.005"0,13 mm

32 µ"0,8 µm Ra

.002"0,05mm

≤

≤

ø1000≤≤

±

ø

øø

CAUTIONS

These instructions are general in nature. It is assumed thatthe installer is familiar with seals and certainly with therequirements of their plant for the successful use ofmechanical seals. If in doubt, get assistance from someonein the plant who is familiar with seals or delay the installationuntil a seal representative is available. All necessary auxiliary

arrangements for successful operation (heating, cooling,flushing) as well as safety devices must be employed. Thesedecisions are to be made by the user. The chemical listingis intended as a general reference for this seal only. Thedecision to use this seal or any other Chesterton seal in aparticular service is the customer's responsibility.

2

SEAL PREPARATION

SCREW AND BOLT TORQUE

SEAL SIZE HOLDER CAP SCREWS* GLAND CAP STUFFING BOX (X) SCREWS** (Y) BOLTS** (Z)

up to 2.50" 40 in-lbf 43 in-lbf 125 - 175 in-lbf 15 - 20 ft-lbf (60 mm) (4,5 Nm) (4,8 Nm) (14-20 Nm) (13,5 -27 Nm)

up to 4.75" 100 in-lbf 110 in-lbf 150 - 200 in-lbf 20 - 25 ft-lbf (120 mm) (11,3 Nm) (12,4 Nm) (17-23 Nm) (27-34 Nm)

up to 7.50" 325 in-lbf 325 in-lbf 200 - 300 in-lbf 20 -30 ft-lbf(190 mm) (36,8 Nm) (36,8 Nm) (23-34 Nm) (27-40 Nm)

* Recommended maximum. ** Typical values.Torque necessary to seat stuffing box gasket varies with bolt size and gasket sealing surfaces.

515

12

11

4

3

210

16

1. Rotary Holder2. Socket Head Cap Screw (X)3. Holder Gasket4. Static O-ring5. Rotary O-ring6. Rotary Face7. Stationary Face8. Stationary O-Ring9. Gland Gasket

10. Socket Head Cap Screw (Y)11. Stuffing Box Gasket12. Anti-Rotation Pin13. Vacuum Spacer14. Spring15. Centering Button16. Gland17. Stuffing Box Bolts (Z)18. Bolt Tabs – X-Large only

(not shown)

19814

13

717

6

Please read these instructions andmake sure you understand thembefore installing the seal.

Installation is easy provided the parts are handled and installed carefully. Make sure your hands are clean. Any dirt particles on the seal faces orsplits during handling may cause sealfailure. Prepare a clean work surface onwhich to place parts duringassembly/disassembly.

Prepare the Seal for Installation (1-6)

1. Disengage the socket head capscrews from one half of the gland.With the gland in a horizontalposition, springs up, separate the halves and place them on the clean work surface.

2. You now have access to the rotaryholder. Disengage the two sockethead cap screws from one half of the rotary holder and place the holder halves on the clean work surface.

3. Remove the rotary and stationaryseal faces from their packages andplace on the clean work surface.

4. Make sure that the gland gaskets,holder gaskets, stuffing box gasket(no grease), and shaft o-ring areproperly greased and seated in their grooves. Note the gold mark on one end of each half of the cutshaft o-ring. Assure that the o-ring is placed in the rotary holder suchthat the two gold marks mate at one joint. Do not glue the gland or holder gaskets in place.

5. Snap open the ball and socket jointof the O-rings by pulling at the seam.(NOTE: The rotary O-ring is slightlylonger and is marked with a purpledot.) Do not apply grease or glue to the balls and sockets of the O-rings.

6. Install seal per instructions(pages 3 & 4).

NOTES:

The gland, rotary holder, and face halves are matched pairs; mixingcomponents from different seals willresult in seal failure.

Handle parts carefully. Greasyfingerprints on seal faces or misalignedface splits may cause leakage.

EQUIPMENT START UP

1. Rotate the shaft by hand to ensureno metal-to-metal contact within the seal. A slight drag may be founddue to the seal faces but the shaftshould rotate freely.

2. Attach appropriate plumbing to theseal. Take all necessary precautionsand follow normal safety proceduresbefore starting the equipment.

3. Depending on how carefully the seal components were handledduring installation, split seals may drip on startup. For example,greasy fingerprints on the faces ormisaligned face splits may causeleakage. This type of leakage usually

decreases and stops over a period of time as a carbon face wears in orleak paths are sealed. However,leakage greater than 60 drops perminute should be investigatedimmediately. If the leakage remainssteady, check O-rings and gasketsfor proper installation and check thefaces for chips, scratches, andproper alignment.

3

INSTALLATION

21 3

4 5 6

7 8 9

10 11 12

13 14 15

4

INSTALLATION

23 2422

SEAL REBUILD

1. Only the gland and rotary holder arereused.

CAUTION: The gland, holder, and face halves are matched pairs;do not mix halves from different sealssince this will cause seal failure.

2. The following tools may be requiredfor rebuild:• Vice grips (remove drive pin)• Arbor press (replace drive pin)• Blunt thin lever (remove buttons)• Rubber mallet (replace buttons

and springs)• Channel lock pliers

(remove springs)• Isopropyl alcohol/actone (clean

gasket surface)

3. Disassemble the seal, noting thecondition of the parts. Analyze thecause of failure and correct theproblem, if possible, beforereinstalling the seal.

4. Rebuild of the rotary holder isoptional if the shaft O-ring, holdergaskets and drive pin are in goodcondition.

Seal Drive PinSize Protrusionup to 2 1/2" 0.188"

(60 mm) (4,8 mm)up to 4 3/4" 0.290"

(120 mm) (7,4 mm)up to 7 1/2" 0.435"

(190 mm) (11 mm)

5. Replacement of springs is optional. Do not replace if springs are in goodcondition. Ensure all springs areproperly seated, and parallel to theback of the gland.

6. Remove the stuffing box gasket from the gland face and remove the adhesive residue with isopropylalcohol or acetone. After peeling off the protective backing, seat thegasket halves in the gland recess,overlapping the gland splits. Becareful not to wrinkle the gasket as you install it.

NOTE: Please see Seal Rebuild images 1 through 18.

16 17 18

19 20 21

5

4 5 6

1 2 3

SEAL REBUILD

7 8

12

15

9

13

16

14

10

17

11

18

6

OPERATING CURVES

0.000 0.010 0.020 0.030 0.040 0.050 0.060 0.070 0.080 0.090

2502252001751501251007550250

Radial Motion vs. Pressure CapabilityShaft Sizes: 1.500" to 2.500" (38 mm to 60 mm)

Shaft Runout - TIR (Inches)

0.000 0.025 0.050 0.075 0.100 0.125 0.150

200

175

150

125

100

75

50

25

0

Radial Motion vs. Pressure CapabilityShaft Sizes: 2.625" to 4.750" (65 mm to 120 mm)

0.000 0.025 0.050 0.075 0.100 0.125 0.150

175

150

125

100

75

50

25

0

Radial Motion vs. Pressure CapabilityShaft Sizes: 4.875" to 7.500" (125 mm to 190 mm)

Pre

ssur

e (P

SI)

Shaft Runout - TIR (Inches)

Pre

ssur

e (P

SI)

Shaft Runout - TIR (Inches)

Pre

ssur

e (P

SI)

7

DIMENSIONAL DATA (DRAWINGS) Shaft Sizes: 1.500" to 4.750" (38 mm to 120 mm)

3/8 NPT2 PLACESG

45°

90°

C

D

F

E

A B

M

H

O

N

KEYA – Shaft SizeB – Maximum Gland DiameterC – Min./Max. Stuffing Box DiameterD – Gland LengthE – Minimum Stuffing Box DepthF – Outboard Space Required

G – Minimum Bolt Circle by Bolt SizeH – Minimum Stuffing Box Face ODM – Holder ID from BoxN – Installation DimensionO – Shaft O-ring Number

A B C D E F G MIN H M N O

MAX MIN MAX MIN 8 mm 10 mm 12 mm 14 mm 16 mm 18 mm MIN O-RING

38.0 134.1 53.6 67.4 37.6 4.3 45.2 90.6 92.6 94.6 73.8 13.5 2.4 22340.0 137.3 56.8 70.2 37.6 4.3 45.2 93.0 95.0 97.0 76.2 13.5 2.4 22343.0 140.5 60.0 73.4 37.6 4.3 45.2 96.1 98.1 100.1 79.2 13.5 2.4 22445.0 140.5 60.0 73.4 37.6 4.3 45.2 96.1 98.1 100.1 79.2 13.5 2.4 22548.0 143.6 63.1 76.6 37.6 4.3 45.2 99.4 101.4 103.4 82.6 13.5 2.4 22650.0 146.8 66.3 80.3 37.6 4.3 45.2 104.5 106.5 108.5 110.5 86.4 13.5 2.4 22655.0 150.0 69.5 83.3 37.6 4.3 45.2 107.8 109.8 111.8 113.8 89.7 13.5 2.4 22860.0 156.3 75.8 94.1 37.6 4.3 45.2 119.7 121.7 123.7 125.7 101.6 13.5 2.4 23065.0 204.1 87.9 115.1 46.7 6.6 56.9 145.9 147.9 149.9 151.9 127.8 13.5 2.4 23170.0 204.1 87.9 115.1 46.7 6.6 56.9 145.9 147.9 149.9 151.9 127.8 13.5 2.4 23375.0 210.4 94.2 121.4 46.7 6.6 56.9 152.2 154.2 156.2 158.2 134.1 13.5 2.4 23480.0 216.8 100.6 127.8 46.7 6.6 56.9 157.6 159.6 161.6 163.6 165.6 167.6 140.5 13.5 2.4 23685.0 223.1 106.9 134.1 46.7 6.6 56.9 164.0 166.0 168.0 170.0 172.0 174.0 146.8 13.5 2.4 23790.0 223.1 106.9 134.1 46.7 6.6 56.9 164.0 166.0 168.0 170.0 172.0 174.0 146.8 13.5 2.4 23995.0 229.5 113.3 140.5 46.7 6.6 56.9 170.3 172.3 174.3 176.3 178.3 180.3 153.2 13.5 2.4 241

100.0 235.8 119.6 146.8 46.7 6.6 56.9 176.7 178.7 180.7 182.7 184.7 186.7 159.5 13.5 2.4 242110.0 248.5 132.3 159.5 46.7 6.6 56.9 189.4 191.4 193.4 195.4 197.4 199.4 172.2 13.5 2.4 245115.0 248.5 132.3 159.5 46.7 6.6 56.9 189.4 191.4 193.4 195.4 197.4 199.4 172.2 13.5 2.4 247120.0 254.9 138.7 159.5 46.7 6.6 56.9 189.4 191.4 193.4 195.4 197.4 199.4 172.2 13.5 2.4 248

8

DIMENSIONAL DATA (METRIC) Shaft Sizes: 38 mm to 120 mm

DIMENSIONAL DATA (INCH) Shaft Sizes: 1.500" to 4.750"

A B C D E F G MIN H M N O

MAX MIN MAX MIN 3/8" 1/2" 5/8" 3/4" MIN O-RING

1.500 5.28 2.11 2.66 1.48 0.17 1.78 3.60 3.73 2.91 0.53 0.094 2231.625 5.41 2.24 2.77 1.48 0.17 1.78 3.70 3.82 3.00 0.53 0.094 2241.750 5.53 2.36 2.89 1.48 0.17 1.78 3.82 3.94 3.12 0.53 0.094 2251.875 5.66 2.49 3.02 1.48 0.17 1.78 3.95 4.07 3.25 0.53 0.094 2262.000 5.78 2.61 3.16 1.48 0.17 1.78 4.10 4.23 4.35 3.40 0.53 0.094 2272.125 5.91 2.74 3.28 1.48 0.17 1.78 4.23 4.36 4.48 3.53 0.53 0.094 2282.250 6.03 2.86 3.42 1.48 0.17 1.78 4.35 4.48 4.60 3.65 0.53 0.094 2292.375 6.16 2.99 3.71 1.48 0.17 1.78 4.70 4.83 4.95 4.00 0.53 0.094 2302.500 6.28 3.11 3.71 1.48 0.17 1.78 4.70 4.83 4.95 4.00 0.53 0.094 2312.625 8.03 3.46 4.53 1.84 0.26 2.24 5.73 5.86 5.98 5.03 0.53 0.094 2322.750 8.03 3.46 4.53 1.84 0.26 2.24 5.73 5.86 5.98 5.03 0.53 0.094 2332.875 8.28 3.71 4.78 1.84 0.26 2.24 5.98 6.11 6.23 5.28 0.53 0.094 2343.000 8.28 3.71 4.78 1.84 0.26 2.24 5.98 6.11 6.23 5.28 0.53 0.094 2353.125 8.53 3.96 5.03 1.84 0.26 2.24 6.23 6.35 6.48 6.60 5.53 0.53 0.094 2363.250 8.53 3.96 5.03 1.84 0.26 2.24 6.23 6.35 6.48 6.60 5.53 0.53 0.094 2373.375 8.78 4.21 5.28 1.84 0.26 2.24 6.48 6.60 6.73 6.85 5.78 0.53 0.094 2383.500 8.78 4.21 5.28 1.84 0.26 2.24 6.48 6.60 6.73 6.85 5.78 0.53 0.094 2393.625 9.03 4.46 5.53 1.84 0.26 2.24 6.73 6.85 6.98 7.10 6.03 0.53 0.094 2403.750 9.03 4.46 5.53 1.84 0.26 2.24 6.73 6.85 6.98 7.10 6.03 0.53 0.094 2413.875 9.28 4.71 5.78 1.84 0.26 2.24 6.98 7.10 7.23 7.35 6.28 0.53 0.094 2424.000 9.28 4.71 5.78 1.84 0.26 2.24 6.98 7.10 7.23 7.35 6.28 0.53 0.094 2434.125 9.53 4.96 6.03 1.84 0.26 2.24 7.23 7.35 7.48 7.60 6.53 0.53 0.094 2444.250 9.53 4.96 6.03 1.84 0.26 2.24 7.23 7.35 7.48 7.60 6.53 0.53 0.094 2454.375 9.78 5.21 6.28 1.84 0.26 2.24 7.48 7.60 7.73 7.85 6.78 0.53 0.094 2464.500 9.78 5.21 6.28 1.84 0.26 2.24 7.48 7.60 7.73 7.85 6.78 0.53 0.094 2474.625 10.03 5.46 6.28 1.84 0.26 2.24 7.48 7.60 7.73 7.85 6.78 0.53 0.094 2484.750 10.03 5.46 6.28 1.84 0.26 2.24 7.48 7.60 7.73 7.85 6.78 0.53 0.094 249

9

DIMENSIONAL DATA (DRAWINGS) Shaft Sizes: 4.875" to 7.500" (125 mm to 190 mm)

KEYA – Shaft SizeB – Maximum Gland DiameterC – Min./Max. Stuffing Box DiameterD – Gland LengthE – Minimum Stuffing Box DepthF – Outboard Space Required

G – Minimum Bolt Circle by Bolt SizeH – Minimum Stuffing Box Face ODL – Gland Hub ODM – Holder ID from BoxN – Installation DimensionO – Shaft O-ring Number

C

O

D

F

E

A

G L

B

10°27°

1/2 NPT2 PLACES

H

M

N

442MT2 is a trademark of A.W. Chesterton Company.

DIMENSIONAL DATA (INCH) Shaft Sizes: 4.875" to 7.500"

A B C D E F G MIN H L M N O

MAX MIN MAX MIN 5/8" 3/4" 7/8" MIN MAX O-RING

4.875 11.53 5.93 7.15 2.91 0.29 3.45 8.63 8.75 8.88 7.75 7.99 1.03 0.188 3535.000 11.53 6.05 7.15 2.91 0.29 3.45 8.63 8.75 8.88 7.75 7.99 1.03 0.188 3545.125 11.78 6.18 7.40 2.91 0.29 3.45 8.88 9.00 9.13 8.00 8.24 1.03 0.188 3555.250 11.78 6.30 7.40 2.91 0.29 3.45 8.88 9.00 9.13 8.00 8.24 1.03 0.188 3565.375 12.03 6.43 7.65 2.91 0.29 3.45 9.13 9.25 9.38 8.25 8.49 1.03 0.188 3575.500 12.03 6.55 7.65 2.91 0.29 3.45 9.13 9.25 9.38 8.25 8.49 1.03 0.188 3585.625 12.28 6.68 7.90 2.91 0.29 3.45 9.38 9.50 9.63 8.50 8.74 1.03 0.188 3595.750 12.28 6.80 7.90 2.91 0.29 3.45 9.38 9.50 9.63 8.50 8.74 1.03 0.188 3605.875 12.53 6.93 8.15 2.91 0.29 3.45 9.63 9.75 9.88 8.75 8.99 1.03 0.188 3616.000 12.53 7.05 8.15 2.91 0.29 3.45 9.63 9.75 9.88 8.75 8.99 1.03 0.188 3626.125 12.78 7.18 8.40 2.91 0.29 3.45 9.88 10.00 10.13 9.00 9.25 1.03 0.188 3626.250 12.78 7.30 8.40 2.91 0.29 3.45 9.88 10.00 10.13 9.00 9.25 1.03 0.188 3636.375 13.03 7.43 8.65 2.91 0.29 3.45 10.13 10.25 10.38 9.25 9.50 1.03 0.188 3636.500 13.03 7.55 8.65 2.91 0.29 3.45 10.13 10.25 10.38 9.25 9.50 1.03 0.188 3646.625 13.29 7.68 8.90 2.91 0.29 3.45 10.38 10.50 10.63 9.50 9.75 1.03 0.188 3646.750 13.29 7.80 8.90 2.91 0.29 3.45 10.38 10.50 10.63 9.50 9.75 1.03 0.188 3656.875 13.54 7.93 9.15 2.91 0.29 3.45 10.63 10.75 10.88 9.75 10.00 1.03 0.188 3657.000 13.54 8.05 9.15 2.91 0.29 3.45 10.63 10.75 10.88 9.75 10.00 1.03 0.188 3667.125 13.79 8.18 9.40 2.91 0.29 3.45 10.88 11.00 11.13 10.00 10.25 1.03 0.188 3667.250 13.79 8.30 9.40 2.91 0.29 3.45 10.88 11.00 11.13 10.00 10.25 1.03 0.188 3677.375 14.04 8.43 9.65 2.91 0.29 3.45 11.13 11.25 11.38 10.25 10.50 1.03 0.188 3677.500 14.04 8.55 9.65 2.91 0.29 3.45 11.13 11.25 11.38 10.25 10.50 1.03 0.188 368

A B C D E F G MIN H L M N O

MAX MIN MAX MIN 18 mm 20 mm 22 mm MIN MAX O-RING

125.0 292.8 153.7 181.6 73.9 7.4 87.6 221.4 223.4 225.4 196.9 202.9 26.2 4.8 354130.0 299.2 156.8 188.0 73.9 7.4 87.6 227.8 229.8 231.8 203.2 209.3 26.2 4.8 355135.0 305.6 163.2 194.3 73.9 7.4 87.6 234.1 236.1 238.1 209.6 215.7 26.2 4.8 356140.0 305.6 166.4 194.3 73.9 7.4 87.6 234.1 236.1 238.1 209.6 215.7 26.2 4.8 358145.0 312.0 172.7 200.7 73.9 7.4 87.6 240.5 242.5 244.5 215.9 222.1 26.2 4.8 359150.0 318.3 179.1 207.0 73.9 7.4 87.6 246.8 248.8 250.8 222.3 228.4 26.2 4.8 361155.0 324.7 182.2 213.4 73.9 7.4 87.6 253.2 255.2 257.2 228.6 234.8 26.2 4.8 362160.0 331.1 188.6 219.7 73.9 7.4 87.6 259.5 261.5 263.5 235.0 241.2 26.2 4.8 363165.0 331.1 191.8 219.7 73.9 7.4 87.6 259.5 261.5 263.5 235.0 241.2 26.2 4.8 364170.0 337.5 198.1 226.1 73.9 7.4 87.6 265.9 267.9 269.9 241.3 247.6 26.2 4.8 364175.0 343.9 201.3 232.4 73.9 7.4 87.6 272.2 274.2 276.2 247.7 254.0 26.2 4.8 365180.0 350.2 207.6 238.8 73.9 7.4 87.6 278.6 280.6 282.6 254.0 260.4 26.2 4.8 366185.0 350.2 210.8 238.8 73.9 7.4 87.6 278.6 280.6 282.6 254.0 260.4 26.2 4.8 367190.0 356.6 217.2 245.1 73.9 7.4 87.6 284.9 286.9 288.9 260.4 266.8 26.2 4.8 368

DIMENSIONAL DATA (METRIC) Shaft Sizes: 125 mm to 190 mm

FORM NO. 072957 REV. 6 PRINTED IN USA 05/07

860 Salem StreetGroveland, MA 01834 USATelephone: 781-438-7000 Fax: 978-469-6528www.chesterton.com

© A.W.Chesterton Company, 2007. All rights reserved.® Registered trademark owned and licensed by

A.W.Chesterton Company in USA and other countries.

ISO Certifications available at www.chesterton.com/corporate/iso